CN209946546U - Large aerial image imaging device - Google Patents

Abstract

The utility model provides a can be with the great and large-scale aerial image imaging device of the aerial image of uneven height meticulous of simple structure formation of image. The large aerial image imaging device has: a 1 st transparent substrate (13); a 1 st light control unit (16) in which a plurality of 1 st light control elements (15) are arranged in a row on the upper surface of a 1 st transparent substrate (13), the 1 st light control elements (15) including a plurality of strip-shaped light reflection surfaces (11) arranged in parallel at intervals in an erected state; a 2 nd light control unit (18) in which a plurality of 2 nd light control elements (17) are arranged in a row on the upper surface of the 1 st light control unit (16), the 2 nd light control elements (17) including a plurality of strip-shaped light reflection surfaces (12) arranged in parallel at intervals in an erected state; and a 2 nd transparent substrate (19) disposed on the upper surface of the 2 nd light control unit (18).

Description

Large aerial image imaging device

Technical Field

The utility model relates to a can form images great and high fine aerial like large-scale aerial image device like.

Background

As a device for forming an aerial (stereoscopic) image using light (scattered light) emitted from an object surface, for example, as shown in fig. 8 and 9, there is an optical imaging device (stereoscopic imaging device) 100 disclosed in patent document 1 published on 10 and 29/2009. The optical imaging device 100 has a pair of 1 st and 2 nd light control panels 101 and 102. The 1 st and 2 nd light control panels 101 and 102 have light reflecting surfaces 105 and 106 made of strip-shaped metal reflecting surfaces (mirror surfaces) arranged at a predetermined pitch in the transparent flat plates 103 and 104, respectively, and vertically arranged in the thickness direction of the transparent flat plates 103 and 104. The optical imaging device 100 is formed by bringing the 1 st and 2 nd light control panels 101 and 102 into close contact with each other with one surfaces thereof facing each other so that the light reflection surfaces 105 and 106 of the 1 st and 2 nd light control panels 101 and 102 are orthogonal to each other in a plan view. In manufacturing the 1 st and 2 nd light control panels 101 and 102, a plurality of transparent synthetic resin plates or glass plates (hereinafter, also referred to as "transparent plates") having a certain thickness and having a metal reflection surface formed on one surface side thereof are stacked so that the metal reflection surface is disposed on one side to prepare a laminate, and the laminate is cut so as to form a cut surface perpendicular to each metal reflection surface.

To explain the operation of the optical imaging device 100 with reference to fig. 8 and 9, when light emitted from the object N disposed on one side of the 1 st light control panel 101 of the optical imaging device 100 obliquely enters the surface on one side of the 1 st light control panel 101, the entered light enters the 1 st light control panel 101 and is reflected at the point c of the light reflection surface 105. The reflected light reflected at the point c of the light reflection surface 105 enters the 2 nd light control panel 102 from the other surface of the 1 st light control panel 101 through the one surface of the 2 nd light control panel 102. Here, some of the light entering the 2 nd light control panel 102 is reflected at a point d on the light reflection surface 106 of the 2 nd light control panel 102, travels inside the 2 nd light control panel 102, and is emitted from the other surface of the 2 nd light control panel 102 to the outside.

Here, since the light reflecting surfaces 105 and 106 are arranged so as to be vertically overlapped with each other in a plan view, of the reflected light reflected at the point c of the light reflecting surface 105 and reflected at the point d of the light reflecting surface 106, the reflected light reflected at the point d of the light reflecting surface 106 and the incident light entering the light reflecting surface 105 travel in parallel in a plan view (see fig. 9). Therefore, among the light incident on the optical imaging device 100 from the object N, the reflected light continuously reflected on the light reflecting surfaces 105 and 106 converges at a position symmetrical to the object N with the optical imaging device 100 interposed therebetween, thereby generating an aerial image N'.

Patent document 1 also describes the following: a1 st and a 2 nd light control panels having a groove with a right-angled triangle cross section are made of a transparent plate, and the 1 st and the 2 nd light control panels are brought into close contact with each other so that their respective light reflection surfaces are perpendicular in a plan view, thereby providing an optical imaging device. In this case, the vertical surface of the groove having a triangular cross section serves as a light reflecting surface, and total reflection is performed.

Prior art documents

Patent document

Patent document 1: international publication No. 2009/131128

SUMMERY OF THE UTILITY MODEL

Problem to be solved by utility model

However, in the above-described conventional techniques, when the 1 st and 2 nd light control panels themselves are to be made large, it takes much time and effort to manufacture them, and they are likely to be curved (warped), which causes a problem of lowering the parallelism of the light reflection surfaces. In particular, in the method of manufacturing a laminated body by laminating a plurality of transparent plates each having a metal reflection surface formed on one surface side, as the 1 st and 2 nd light control panels are increased in size, variation and variation in thickness of an adhesive layer formed between the laminated transparent plates are likely to be increased, the pitch of the metal reflection surfaces becomes uneven or a tilt is generated, positional accuracy of the metal reflection surfaces is lowered, and it is difficult to obtain a high-definition aerial image.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a large aerial image imaging device capable of imaging a large aerial image without unevenness and high definition with a simple configuration.

Means for solving the problems

The large aerial image imaging device of the first aspect based on the above object has: a 1 st transparent substrate; a 1 st light control unit in which a plurality of 1 st light control elements are arranged in a row on an upper surface of the 1 st transparent substrate, the 1 st light control elements including a plurality of strip-shaped light reflection surfaces arranged in parallel at intervals in an erected state; a 2 nd light control unit in which a plurality of 2 nd light control elements are arranged in a row on an upper surface of the 1 st light control unit, the 2 nd light control elements including a plurality of strip-shaped light reflection surfaces arranged in parallel at intervals in an erected state; and a 2 nd transparent substrate disposed on an upper surface of the 2 nd light control unit, wherein a plurality of the strip-shaped light reflection surfaces are disposed at equal intervals in a direction perpendicular to the strip-shaped light reflection surfaces in each of the 1 st light control unit and the 2 nd light control unit, the strip-shaped light reflection surfaces adjacent in a longitudinal direction are disposed on a same straight line, and the strip-shaped light reflection surface of the 1 st light control unit and the strip-shaped light reflection surface of the 2 nd light control unit are perpendicular to each other in a plan view.

In the large aerial image forming apparatus according to the first aspect, it is preferable that a 1 st transparent adhesive layer is provided between the 1 st transparent substrate and the 1 st light control unit, a 2 nd transparent adhesive layer is provided between the 2 nd transparent substrate and the 2 nd light control unit, and an intermediate transparent adhesive layer is provided between the 1 st light control unit and the 2 nd light control unit.

In the large aerial image forming apparatus according to the first aspect, it is preferable that each of the 1 st light controlling element and the 2 nd light controlling element is formed by alternately laminating a transparent block body having a rectangular parallelepiped shape and a metal layer constituting the belt-like light reflecting surface.

In the large aerial image forming apparatus according to the first aspect, it is preferable that the 1 st light control element and the 2 nd light control element are each formed by arranging a plurality of grooves having a triangular cross section with a vertical surface and an inclined surface and a plurality of ridges having a triangular cross section formed between the adjacent grooves in parallel on one surface side of a transparent plate material, the vertical surface of each groove has a metal layer forming the belt-shaped light reflection surface, and the 1 st light control element and the 2 nd light control element have a transparent filling portion filled with a transparent filling material having a refractive index equal to or similar to a refractive index of each transparent plate material in each groove of the 1 st light control element and the 2 nd light control element.

In the large aerial image forming apparatus according to the first aspect, the 1 st light control element and the 2 nd light control element are preferably formed in a quadrilateral shape having a side length of 50 to 200mm in a plan view.

In the large aerial image forming apparatus according to the first aspect, in the 1 st light control unit and the 2 nd light control unit, the transparent block body of the 1 st light control element and the 2 nd light control element on one side of the 1 st light control element and the 2 nd light control element adjacent to each other in a direction perpendicular to the belt-shaped light reflection surface may be disposed adjacent to the transparent block body or the metal layer of the 1 st light control element and the 2 nd light control element on the other side, and a transparent adhesive layer for bonding may be provided therebetween.

In the large aerial image forming apparatus according to the first aspect, in the 1 st light control unit and the 2 nd light control unit, the metal layer of one of the 1 st light control element and the 2 nd light control element adjacent to each other in the direction perpendicular to the strip-shaped light reflection surface may be disposed adjacent to the metal layer of the other of the 1 st light control element and the 2 nd light control element, and a bonding opaque adhesive layer may be provided therebetween.

A large aerial image imaging device of a second aspect based on the above object has: an intermediate transparent substrate; a 1 st light control unit in which a plurality of 1 st light control elements are arranged in a row on a lower surface of the intermediate transparent substrate, the 1 st light control elements including a plurality of strip-shaped light reflection surfaces arranged in parallel at intervals in an erected state; and a 2 nd light control unit in which a plurality of 2 nd light control elements are arranged in a row on an upper surface of the intermediate transparent substrate, the 2 nd light control elements including a plurality of strip-shaped light reflection surfaces arranged in parallel with a gap in an erected state, the plurality of strip-shaped light reflection surfaces being arranged at equal intervals in a direction perpendicular to the strip-shaped light reflection surfaces in each of the 1 st light control unit and the 2 nd light control unit, the strip-shaped light reflection surfaces adjacent in a longitudinal direction being arranged on a same straight line, and the strip-shaped light reflection surface of the 1 st light control unit and the strip-shaped light reflection surface of the 2 nd light control unit being perpendicular to each other in a plan view.

In the second aspect of the large aerial image forming apparatus, it is preferable that a lower surface transparent adhesive layer is provided between the intermediate transparent substrate and the 1 st light control unit, and an upper surface transparent adhesive layer is provided between the intermediate transparent substrate and the 2 nd light control unit.

In the second aspect of the large aerial image forming apparatus, it is preferable that the 1 st light control element and the 2 nd light control element are formed by alternately laminating a transparent block body having a rectangular parallelepiped shape and a metal layer constituting the belt-like light reflecting surface.

In the second aspect of the large aerial image forming apparatus, in the 1 st light control unit and the 2 nd light control unit, the transparent block body of the 1 st light control element and the 2 nd light control element on one side of the 1 st light control element and the 2 nd light control element adjacent to each other in a direction perpendicular to the strip-shaped light reflection surface may be disposed adjacent to the transparent block body or the metal layer of the 1 st light control element and the 2 nd light control element on the other side, and a transparent adhesive layer for bonding may be provided therebetween.

In the second aspect of the large aerial image forming apparatus, in the 1 st light control unit and the 2 nd light control unit, the metal layer of one of the 1 st light control element and the 2 nd light control element adjacent to each other in the direction perpendicular to the strip-shaped light reflection surface may be disposed adjacent to the metal layer of the other of the 1 st light control element and the 2 nd light control element, and a bonding opaque adhesive layer may be provided therebetween.

In the second aspect of the large aerial image forming apparatus, the 1 st light control element and the 2 nd light control element may be configured such that a plurality of grooves each having a triangular cross section with a vertical surface and an inclined surface and a plurality of ridges each having a triangular cross section formed between adjacent grooves are arranged in parallel on one surface side of a transparent plate material, the vertical surface of each groove has a metal layer forming the belt-shaped light reflection surface, and the 1 st light control element and the 2 nd light control element may have a transparent filling portion filled with a transparent filling material having a refractive index equal to or similar to a refractive index of each transparent plate material in each groove of the 1 st light control element and the 2 nd light control element.

In the second aspect of the large aerial image forming apparatus, it is preferable that each of the 1 st light control element and the 2 nd light control element is formed in a quadrilateral shape having a side length of 50 to 200mm in a plan view.

Effect of the utility model

In the large aerial image forming apparatus according to the first aspect, the 1 st and 2 nd light control elements are arranged on the 1 st and 2 nd transparent substrates, respectively, and are positioned and fixed, whereby the ribbon-shaped light reflection surfaces of the 1 st and 2 nd light control portions can be accurately arranged without causing warpage (undulation) and undulation even if the apparatus is large.

In the second aspect of the large aerial image forming apparatus, the plurality of 1 st and 2 nd light control elements are arranged on the intermediate transparent substrate and positioned and fixed, so that the strip-shaped light reflection surfaces of the 1 st and 2 nd light control portions can be accurately arranged without causing warpage (warpage) and undulation even if the apparatus is large.

In the first and second aspects, when the 1 st and 2 nd light control elements are formed by alternately laminating transparent block bodies having a rectangular parallelepiped shape and metal layers constituting strip-shaped light reflection surfaces, deformation is less likely to occur, the form stability is excellent, and the parallelism of the strip-shaped light reflection surfaces of the 1 st and 2 nd light control sections can be improved.

In the first and second aspects, the 1 st and 2 nd light control units are configured such that the transparent block bodies of the 1 st and 2 nd light control elements on one side and the transparent block bodies or the metal layers of the 1 st and 2 nd light control elements on the other side are disposed adjacent to each other in the direction perpendicular to the longitudinal direction of the strip-shaped light reflection surface, and when a transparent adhesive layer for bonding is provided therebetween, the portions other than the metal layers of the 1 st and 2 nd light control units are transparent, and both surfaces of the metal layers can be reliably reflected light as strip-shaped light reflection surfaces.

In the first and second aspects, the 1 st and 2 nd light control sections are configured such that the metal layers of the 1 st and 2 nd light control elements on one side and the metal layers of the 1 st and 2 nd light control elements on the other side are disposed adjacent to each other in a direction perpendicular to the longitudinal direction of the strip-shaped light reflection surface, and when a bonding opaque adhesive layer is provided therebetween, light does not pass between the adjacent metal layers at the boundary between the 1 st and 2 nd light control sections (bonding opaque adhesive layer), and both surfaces of the metal layers can reliably reflect light as the strip-shaped light reflection surface, and a high-definition aerial image free from unevenness and noise is obtained.

In the first and second aspects, the 1 st and 2 nd light controlling elements are each formed by arranging in parallel on one surface side of a transparent plate a plurality of grooves each having a triangular cross section and a vertical surface and an inclined surface, and a plurality of ridges each having a triangular cross section and formed between adjacent grooves, the vertical surface of each groove having a metal layer forming a strip-shaped light reflecting surface, and the 1 st and 2 nd light controlling elements each having a transparent filling portion filled with a transparent filling material having a refractive index equal to or similar to that of each transparent plate, the grooves and ridges can be formed simply and accurately by any of press forming, injection molding and roll forming, the metal layers can be arranged at equal intervals, and both surfaces of the metal layers can be used as strip-shaped light reflecting surfaces to reliably reflect light.

In the first and second aspects, when the 1 st and 2 nd light control elements are formed in a quadrangular shape having a length of 50 to 200mm on each side in a plan view, occurrence of bending (warpage) and undulation in the 1 st and 2 nd light control elements can be prevented, and by arranging the 1 st and 2 nd light control elements in a vertical and horizontal direction, a large-sized 1 st and 2 nd light control section in which a plurality of strip-shaped light reflection surfaces are arranged highly finely without being deformed can be obtained, and a large and highly fine aerial image without unevenness can be formed.

Drawings

Fig. 1 is a plan view of a large aerial image forming apparatus according to embodiment 1 of the present invention.

Fig. 2(a) and 2(B) are a main-part cross-sectional enlarged view perpendicular to the belt-shaped light reflecting surface of the 1 st light control unit and a main-part cross-sectional enlarged view parallel to the belt-shaped light reflecting surface of the 1 st light control unit, respectively, of the large aerial image forming apparatus.

Fig. 3(a) and 3(B) are a main part cross-sectional enlarged view perpendicular to the belt-shaped light reflecting surface of the 1 st light control section and a main part cross-sectional enlarged view parallel to the belt-shaped light reflecting surface of the 1 st light control section, respectively, in the 1 st modification of the large aerial image imaging device.

Fig. 4(a) and 4(B) are a main part cross-sectional enlarged view perpendicular to the belt-shaped light reflecting surface of the 1 st light control section and a main part cross-sectional enlarged view parallel to the belt-shaped light reflecting surface of the 1 st light control section, respectively, in the 2 nd modification of the large aerial image capturing device.

Fig. 5(a) and 5(B) are a main part cross-sectional enlarged view perpendicular to the belt-shaped light reflecting surface of the 1 st light control unit and a main part cross-sectional enlarged view parallel to the belt-shaped light reflecting surface of the 1 st light control unit, respectively, in the large aerial image forming apparatus according to embodiment 2 of the present invention.

Fig. 6(a) and 6(B) are a main-part cross-sectional enlarged view perpendicular to the belt-shaped light reflecting surface of the 1 st light control unit and a main-part cross-sectional enlarged view parallel to the belt-shaped light reflecting surface of the 1 st light control unit, respectively, in the large aerial image forming apparatus according to embodiment 3 of the present invention.

Fig. 7(a) and 7(B) are a main part cross-sectional enlarged view perpendicular to the belt-shaped light reflecting surface of the 1 st light control unit and a main part cross-sectional enlarged view parallel to the belt-shaped light reflecting surface of the 1 st light control unit, respectively, in the large aerial image forming apparatus according to embodiment 4 of the present invention.

Fig. 8 is a perspective view showing a conventional optical imaging apparatus (stereoscopic imaging apparatus).

Fig. 9 is a plan view showing a conventional optical imaging apparatus (stereoscopic imaging apparatus).

Description of the reference symbols

10: large aerial image imaging device, 11, 12: strip light reflecting surface, 13: 1 st transparent substrate, 15: 1 st light control element, 16: 1 st light control unit, 17: 2 nd light control element, 18: 2 nd light control unit, 19: 2 nd transparent substrate, 20: 1 st transparent adhesive layer, 21: 2 nd transparent adhesive layer, 22: intermediate transparent adhesive layer, 23, 24: transparent adhesive layer for bonding, 25: transparent block, 26: metal layer, 27: transparent laminated adhesive layer, 30: large aerial image imaging device, 31: 1 st light control unit, 32: 2 nd light control unit, 33: bonding opaque adhesive layer, 35: large aerial image imaging device, 36: 1 st light control unit, 37: 2 nd light control unit, 38: 1 st light control element, 39: 2 nd light control element, 40: end transparent block, 42: large aerial image imaging device, 43: intermediate transparent substrate, 44: the following transparent adhesive layer, 45: upper transparent adhesive layer, 47: large aerial image imaging device, 48: 1 st light control unit, 49: 2 nd light control unit, 50: 1 st light control element, 51: 2 nd light control element, 52: transparent plate, 53: vertical plane, 54: inclined surface, 55: groove, 56: convex strip, 57: transparent filling part, 58, 59: micro flat surface portion, 62, 63: transparent adhesive layer for bonding, 65: a large aerial image imaging device.

Detailed Description

Next, a large aerial image forming apparatus according to an embodiment of the present invention will be described with reference to the drawings.

In the large aerial image forming apparatus 10 according to embodiment 1 of the present invention shown in fig. 1, 2(a), and 2(B), the plurality of strip-shaped light reflecting surfaces 11 and 12 are arranged to be perpendicular to each other in a plan view, and light incident from one surface side (for example, below the large aerial image forming apparatus 10) is reflected by the strip-shaped light reflecting surfaces 11 and 12 and emitted from the other surface side (for example, above the large aerial image forming apparatus 10), so that the aerial image forming apparatus for forming an aerial image is large in size.

The details of the large aerial image imaging device 10 will be described below.

As shown in fig. 2(a) and 2(B), the large aerial image imaging apparatus 10 includes: a 1 st transparent substrate 13; a 1 st light control unit 16 in which a plurality of 1 st light control elements 15 are arranged in a row on an upper surface of a 1 st transparent substrate 13, the 1 st light control elements 15 including a plurality of strip-shaped light reflection surfaces 11 arranged in parallel with each other at intervals in an erected state; a 2 nd light control unit 18 in which a plurality of 2 nd light control elements 17 are arranged in a row on the upper surface of the 1 st light control unit 16, the 2 nd light control elements 17 including a plurality of strip-shaped light reflection surfaces 12 arranged in parallel with intervals in an erected state; and a 2 nd transparent substrate 19 disposed on an upper surface of the 2 nd light control unit 18. The 1 st and 2 nd light control elements 15 and 17 are preferably formed in a quadrangular shape having a length of each side of 50 to 200mm in a plan view. In the present embodiment (fig. 1), 9 1 st and 2 nd light control elements 15 and 17 having a 3 × 3 longitudinal and transverse direction are arranged to form 1 st and 2 nd light control sections 16 and 18, respectively, and unnecessary four corners are cut off in actual use. In this case, the cutting range may be appropriately selected, and as shown in fig. 1, the cutting range may be cut so that the external shape becomes an octagon or a square. Further, the number of the 1 st and 2 nd light control elements 15 and 17 can be selected as appropriate, and the number of the 1 st and 2 nd light control elements can be increased by increasing the size of the 1 st and 2 nd transparent substrates, whereby a large aerial image forming apparatus having a side length of 1 to 3m, for example, can be obtained.

As shown in fig. 2(a) and 2(B), the large aerial image forming apparatus 10 includes a 1 st transparent adhesive layer 20 between the 1 st transparent substrate 13 and the 1 st light control unit 16, a 2 nd transparent adhesive layer 21 between the 2 nd transparent substrate 19 and the 2 nd light control unit 18, and an intermediate transparent adhesive layer 22 between the 1 st light control unit 16 and the 2 nd light control unit 18. The large aerial image forming apparatus 10 further includes transparent adhesive layers 23 and 24 for bonding between the 1 st light control elements 15 vertically and horizontally adjacent to each other in the 1 st light control unit 16 (i.e., the outer peripheries of the 1 st light control elements 15) and between the 2 nd light control elements 17 vertically and horizontally adjacent to each other in the 2 nd light control unit 18 (i.e., the outer peripheries of the 2 nd light control elements 17). Here, the bonding transparent adhesive layer 23 is formed along the strip-shaped light reflecting surfaces 11 and 12 of the 1 st and 2 nd light controlling elements 15, and the bonding transparent adhesive layer 24 is formed along the end surfaces of the 1 st and 2 nd light controlling elements 15 perpendicular to the strip-shaped light reflecting surfaces 11 and 12.

The large aerial image imaging device 10 is obtained as follows: a device configuration in which the 1 st light control unit 16 is formed by positioning and bonding the 1 st light control element 15 and the 2 nd light control element 17 on the 1 st transparent substrate 13 and the 2 nd light control unit 18 is formed by positioning and bonding the 2 nd light control element 17 and the 2 nd transparent substrate 19 is prepared, and the 1 st light control unit 16 and the 2 nd light control unit 18 are bonded so as to face each other.

In this case, as shown in fig. 1, 2(a), and 2(B), in the 1 st light control unit 16, the plurality of strip-shaped light reflecting surfaces 11 are arranged at equal intervals in the direction perpendicular to the strip-shaped light reflecting surfaces 11, and the strip-shaped light reflecting surfaces 11 adjacent in the longitudinal direction are arranged on the same straight line. Similarly, in the 2 nd light control unit 18, the plurality of strip-shaped light reflection surfaces 12 are arranged at equal intervals in the direction perpendicular to the strip-shaped light reflection surfaces 12, and the strip-shaped light reflection surfaces 12 adjacent in the longitudinal direction are arranged on the same straight line. The strip-shaped light reflection surface 11 of the 1 st light control unit 16 and the strip-shaped light reflection surface 12 of the 2 nd light control unit 18 are perpendicular to each other in a plan view.

Here, the 1 st and 2 nd light control elements 15 and 17 are formed by alternately laminating transparent block bodies 25 having a rectangular parallelepiped shape and metal layers 26 constituting the strip-shaped light reflection surfaces 11 and 12. The 1 st and 2 nd light control elements 15 and 17 are formed by bonding a plurality of transparent blocks 25 each having a metal layer 26 formed on one side surface (the right side surface in fig. 2 a and 2B) thereof, with a transparent laminating adhesive. Therefore, a transparent laminated adhesive layer 27 formed by curing the adhesive for lamination exists between the other side surface (the left side surface in fig. 2 a and 2B) of each transparent block 25 and the metal layer 26 of the adjacent transparent block 25. Thus, both surfaces (left and right in fig. 2 a and 2B) of the metal layer 26 can function as the strip-shaped light reflecting surfaces 11 and 12.

The metal layer may be formed by directly applying a material having a metal layer formed on the surface of the resin film by sputtering, metal deposition, spraying of metal fine particles, irradiation of an ion beam, coating of a metal paste, or the like, to the surface of the transparent block. As the metal forming the metal layer, aluminum is preferably used, but not limited thereto.

The 1 st and 2 nd light control elements 15 and 17 are conventionally known elements, and specifically, for example, as described in patent document 1, a laminate is produced by laminating a plurality of transparent synthetic resin plates or glass plates having a constant thickness and a metal reflection surface (metal layer) formed on one surface side so that the metal reflection surface is arranged on one side, and then cutting the laminate so as to form a cut surface perpendicular to each metal reflection surface. The method of manufacturing the 1 st and 2 nd light control elements is not limited to this, and can be selected as appropriate.

In the above configuration, the 1 st and 2 nd transparent substrates 13 and 19, the 1 st and 2 nd transparent adhesive layers 20 and 21, the intermediate transparent adhesive layer 22, the bonding transparent adhesive layers 23 and 24, the transparent block 25, and the transparent laminated adhesive layer 27 preferably have the same or similar refractive index. For example, the refractive index of each of the other members is preferably in the range of 0.8 to 1.2 times (more preferably 0.9 to 1.1 times, and still more preferably 0.95 to 1.15 times) based on the refractive index of the 1 st transparent substrate 13, but the present invention is not limited thereto.

As the 1 st and 2 nd transparent substrates 13 and 19 and the transparent block 25, glass is preferably used, but synthetic resin may also be used. The same materials are particularly preferably used for these members, but materials having similar refractive indices may also be used in combination.

The 1 st and 2 nd transparent adhesive layers 20 and 21, the intermediate transparent adhesive layer 22, the bonding transparent adhesive layers 23 and 24, and the transparent laminated adhesive layer 27 are obtained by curing a light (UV) -curable adhesive, a two-liquid mixing adhesive, or the like used for bonding the respective portions. As the adhesive used for bonding the respective portions, an optical adhesive made of a refractive index adjusting resin having an adjusted refractive index, or the like may be used. The adhesive layers are particularly preferably formed of the same adhesive, but may be formed of different adhesives having similar refractive indices. The thickness of each adhesive layer is preferably, for example, about 5 to 20 μm, but is not limited thereto.

Here, in fig. 2 a, the transparent block 25 of the 1 st light control element 15 on one side (here, the right side) of the 1 st light control element 15 adjacent to the 1 st light control element 15 in the direction perpendicular to the longitudinal direction of the strip-shaped light reflection surface 11 and the metal layer 26 of the 1 st light control element 15 on the other side (here, the left side) are arranged adjacent to each other in the 1 st light control section 16, and the bonding transparent adhesive layer 23 is formed therebetween. In fig. 2B, the transparent block 25 of the 2 nd light control element 17 on one side (right side in this case) of the 2 nd light control element 17 and the metal layer 26 of the 2 nd light control element 17 on the other side (left side in this case) of the 2 nd light control element 17 adjacent in the direction perpendicular to the longitudinal direction of the strip-shaped light reflecting surface 12 are disposed adjacent to each other in the 2 nd light control section 18, and the bonding transparent adhesive layer 23 is formed therebetween. This makes it possible to arrange the strip-shaped light reflection surfaces 11 and 12 at equal intervals on the whole of the 1 st and 2 nd light control units 16 and 18, and to prevent occurrence of periodic unevenness (stripe pattern) due to missing, blurring, shading, or the like at the time of aerial image formation.

The operation of the large aerial image forming apparatus 10 will be described with reference to fig. 2(a) and 2(B), and when light L11 from an object (not shown) enters the 1 st transparent substrate 13 at P11, it is reflected by the P12 of the strip-shaped light reflecting surface 11 formed on the metal layer 26 of the 1 st light control unit 16, enters the 2 nd light control unit 18, is reflected by the P13 of the strip-shaped light reflecting surface 12 formed on the metal layer 26, and then passes through the 2 nd transparent substrate 19 to be emitted from the position of P14 to the aerial image formation.

Here, as shown in fig. 2(a) and 2(B), the light L11 passes through the 1 st transparent adhesive layer 20 at Q11, the intermediate transparent adhesive layer 22 at Q12, and the 2 nd transparent adhesive layer 21 at Q13, and the 1 st and 2 nd transparent substrates 13 and 19, the 1 st and 2 nd transparent adhesive layers 20 and 21, the intermediate transparent adhesive layer 22, and the transparent bulk 25 have the same or similar refractive index as described above. Furthermore, since the adhesive layers are also thin (for example, about 5 to 20 μm in thickness) and their boundary surfaces are parallel to each other (the thickness is substantially uniform), the influence of refraction is extremely small and phenomena such as total reflection and light splitting do not occur.

Further, the refraction generated at the positions P11 and P14 is canceled out, and therefore has no influence on the aerial image.

In addition, in fig. 2 a and 2B, the case where the light L11 entering the transparent block 25 from the left side of the metal layer 26 of the 1 st and 2 nd light control units 16 and 18 is reflected at the interface between the transparent block 25 and the metal layer 26 (here, the belt-shaped light reflection surfaces 11 and 12 on the left side of the metal layer 26) is described, but since the transparent bonding layer 23 for bonding and the transparent lamination bonding layer 27 are transparent, when the entering direction of the light is reversed in the left-right direction (front-back direction) and the light enters the transparent block 25 from the right side of the metal layer 26 of the 1 st and 2 nd light control units 16 and 18, the light passes through the transparent block 25 and the transparent bonding layer 23 for bonding or the transparent lamination bonding layer 27 and is reflected at the interface between the transparent bonding layer 23 for bonding or the transparent lamination bonding layer 27 and the metal layer 26 (here, the belt-shaped light reflection surfaces 11 and 12 on the right side of the metal layer 26), an aerial image can be imaged in the same manner as described above.

The large aerial image imaging device 30 according to the 1 st modification shown in fig. 3(a) and 3(B) is different from the large aerial image imaging device 10 in that, when the 1 st and 2 nd light control elements 15 and 17 are arranged in the vertical and horizontal directions to form the 1 st and 2 nd light control sections 31 and 32, the metal layer 26 of the 1 st and 2 nd light control elements 15 and 17 on one side of the 1 st and 2 nd light control elements 15 and 17 adjacent to each other in the direction perpendicular to the belt-shaped light reflection surfaces 11 and 12 is arranged adjacent to the metal layer 26 of the 1 st and 2 nd light control elements 15 and 17 on the other side. At this time, if a transparent adhesive layer is present between the adjacent metal layer 26 and the metal layer 26, an unnecessary light not involved in the formation of an aerial image passes through, a periodic stripe pattern or the like is generated, and a high-definition aerial image cannot be obtained. Therefore, in the large aerial image forming apparatus 30, the bonding opaque adhesive layer 33 is provided between the metal layer 26 and the metal layer 26 disposed adjacent to each other in the 1 st and 2 nd light control units 31 and 32. This integrates the adjacent 2 metal layers 26, thereby preventing excessive light from passing therethrough, and obtaining a high-definition aerial image. The interval (pitch) between the metal layers 26 in the 1 st and 2 nd light control elements 15 and 17 is about 200 to 500 μm, whereas the thickness of the bonding opaque adhesive layer 33 is about 5 to 20 μm and is negligibly thin, so that the metal layers 26 (the belt-shaped light reflecting surfaces 11 and 12) can be arranged at substantially equal intervals over the entire 1 st and 2 nd light control sections 31 and 32. The operation of the large aerial image imaging device 30 is the same as that of the large aerial image imaging device 10, and therefore, the description thereof is omitted.

The large aerial image forming apparatus 35 according to the 2 nd modification shown in fig. 4(a) and 4(B) is different from the large aerial image forming apparatus 10 in that end transparent blocks 40 having a thickness of about half the thickness of a normal (other) transparent block 25 are laminated on both outer sides of the 1 st and 2 nd light control elements 38 and 39 constituting the 1 st and 2 nd light control units 36 and 37, and when the 1 st and 2 nd light control elements 38 and 39 are arranged in a vertical direction, the end transparent blocks 40 of the 1 st and 2 nd light control elements 38 and 39 on one side of the 1 st and 2 nd light control elements 38 and 39 adjacent to the strip-shaped light reflection surfaces 11 and 12 are arranged adjacent to the end transparent blocks 40 of the 1 st and 2 nd light control elements 38 and 39 on the other side.

The 1 st and 2 nd light control elements 15 and 17 used in the large aerial image imaging device 10 are arranged so that the transparent blocks 25 are adjacent to each other depending on the arrangement (orientation), and the interval (pitch) between the belt-like light reflecting surfaces 11 and 12 (metal layers 26) may be increased by 2 times only in the portions, thereby degrading the aerial image. In contrast, in the 1 st and 2 nd light control elements 38 and 39 used in the large aerial image forming apparatus 35, the end transparent blocks 40 having a thickness of about half the thickness of the transparent block 25 are disposed adjacent to each other, and the bonding transparent adhesive layer 23 is present between them in the same manner as in the large aerial image forming apparatus 10. Accordingly, the adjacent end transparent blocks 40 can be integrated to function as the other transparent blocks 25, and the strip-shaped light reflection surfaces 11 and 12 (metal layers 26) can be arranged at equal intervals on the entire 1 st and 2 nd light control units 36 and 37, thereby forming a high-definition (uniform) aerial image. Further, since the 1 st and 2 nd light control elements 38 and 39 have the end transparent blocks 40 on both outer sides, the metal layer 26 is not exposed to the outside, and the metal layer 26 can be prevented from being damaged, and the 1 st and 2 nd light control elements 38 and 39 can be easily handled, and the assembling workability can be improved. The operation of the large aerial image imaging device 35 is the same as that of the large aerial image imaging device 10, and therefore, the description thereof is omitted.

Next, a large aerial image forming apparatus 42 according to embodiment 2 of the present invention will be described with reference to fig. 5(a) and 5 (B). Note that the same components as those in embodiment 1 are denoted by the same reference numerals, and description thereof is omitted

The large aerial image forming apparatus 42 is different from the large aerial image forming apparatus 10 in that the 1 st and 2 nd light control units 16 and 18 are formed by arranging a plurality of the 1 st and 2 nd light control elements 15 and 17 on the lower surface and the upper surface of the intermediate transparent substrate 43, respectively.

The large aerial image forming apparatus 42 has a lower surface transparent adhesive layer 44 between the intermediate transparent substrate 43 and the 1 st light control unit 16, and has an upper surface transparent adhesive layer 45 between the intermediate transparent substrate 43 and the 2 nd light control unit 18.

In the above configuration, the intermediate transparent substrate 43, the lower transparent adhesive layer 44, the upper intermediate transparent adhesive layer 45, the bonding transparent adhesive layers 23 and 24, and the transparent laminated adhesive layer 27 have the same or similar refractive index. For example, the refractive index of each of the other members is preferably in the range of 0.8 to 1.2 times (more preferably 0.9 to 1.1 times, and still more preferably 0.95 to 1.15 times) based on the refractive index of the intermediate transparent substrate 43, but the present invention is not limited thereto.

The intermediate transparent substrate 43 is preferably made of the same material as the 1 st or 2 nd transparent substrates 13 and 19 or the transparent block 25, and particularly preferably made of the same material as the transparent block 25.

As the adhesive for forming the lower transparent adhesive layer 44 and the upper transparent adhesive layer 45, the same adhesive as the adhesive for forming the above-described 1 st and 2 nd transparent adhesive layers 20 and 21, the intermediate transparent adhesive layer 22, the bonding transparent adhesive layers 23 and 24, or the transparent laminated adhesive layer 27 is preferably used, and the same adhesive as the adhesive for forming the bonding transparent adhesive layers 23 and 24 and the transparent laminated adhesive layer 27 is particularly preferred, but not necessarily all of them are the same, and different adhesives having similar refractive indices may be used.

When light L21 from an object, not shown, enters the 1 st light control unit 16 at P21, the light L21 is reflected by the P22 of the strip-shaped light reflection surface 11 formed on the metal layer 26, passes through the intermediate transparent substrate 43, enters the 2 nd light control unit 18, is reflected by the P23 of the strip-shaped light reflection surface 12 formed on the metal layer 26, and is emitted from the position of P24 to the aerial image.

Here, as shown in fig. 5(a) and 5(B), Q21 and Q22 of the light L21 before and after the intermediate transparent substrate 43 pass through the lower surface transparent adhesive layer 44 and the upper surface transparent adhesive layer 45, and the intermediate transparent substrate 43, the lower surface transparent adhesive layer 44, the upper surface transparent adhesive layer 45, the transparent adhesive layers 23 and 24 for bonding, the transparent block body 25, and the transparent laminated adhesive layer 27 have the same or similar refractive index. Furthermore, since the adhesive layers are also thin (for example, about 5 to 20 μm in thickness) and their boundary surfaces are parallel to each other (the thickness is substantially uniform), the influence of refraction is extremely small and phenomena such as total reflection and light splitting do not occur.

Further, the refraction generated at the positions P21 and P24 is canceled out, and therefore has no influence on the aerial image.

In addition, in fig. 5 a and 5B, the case where the light L21 entering the transparent block 25 from the left side of the metal layer 26 of the 1 st and 2 nd light control units 16 and 18 is reflected at the interface between the transparent block 25 and the metal layer 26 (here, the belt-shaped light reflection surfaces 11 and 12 on the left side of the metal layer 26) is described, but since the transparent bonding layer 23 for bonding and the transparent lamination bonding layer 27 are transparent, when the entering direction of the light is reversed in the left-right direction (front-back direction) and the light enters the transparent block 25 from the right side of the metal layer 26 of the 1 st and 2 nd light control units 16 and 18, the light passes through the transparent block 25 and the transparent bonding layer 23 for bonding or the transparent lamination bonding layer 27 and is reflected at the interface between the transparent bonding layer 23 for bonding or the transparent lamination bonding layer 27 and the metal layer 26 (here, the belt-shaped light reflection surfaces 11 and 12 on the right side of the metal layer 26), an aerial image can be imaged in the same manner as described above.

Further, as a modification of the large aerial image forming apparatus 42, the 1 st and 2 nd light control units 31 and 32 of the large aerial image forming apparatus 30 or the 1 st and 2 nd light control units 36 and 37 of the large aerial image forming apparatus 35 may be used instead of the 1 st and 2 nd light control units 16 and 18.

Next, a large aerial image forming apparatus 47 according to embodiment 3 of the present invention will be described with reference to fig. 6(a) and 6 (B). Note that the same components as those in embodiment 1 and embodiment 2 are denoted by the same reference numerals, and description thereof is omitted.

The large aerial image forming apparatus 47 is different from the large aerial image forming apparatus 10 in that the 1 st and 2 nd light control elements 50 and 51 constituting the 1 st and 2 nd light control units 48 and 49 are respectively provided with a plurality of grooves 55 having a triangular cross section and each including a vertical surface 53 and an inclined surface 54, and a plurality of ridges 56 having a triangular cross section and each formed between adjacent grooves 55, in parallel on one surface side of a transparent plate material 52, the vertical surface 53 of each groove 55 has a metal layer 26 forming a belt-shaped light reflection surface 11 and 12, and the 1 st and 2 nd light control units 48 and 49 have a transparent filling portion 57 in each groove 55 of the 1 st and 2 nd light control elements 50 and 51, and the transparent filling portion 57 is filled with a transparent filling material having a refractive index equal to or approximate to that of each transparent plate material 52.

Here, as the 1 st and 2 nd light control elements 50 and 51, it is preferable to use a structure in which a thermoplastic transparent resin having a relatively high melting point is used as a raw material, and any one of press molding, injection molding and roll forming is performed, a plurality of grooves 55 and ridges 56 are formed on one surface side of the transparent plate material 52, and the metal layer 26 having the belt-shaped light reflecting surfaces 11 and 12 is formed on the vertical surface 53 of each groove 55. Specific examples of the material of the transparent plate material 52 include thermoplastic transparent resins such as polymethyl methacrylate (acrylic resin), amorphous fluororesin, PMMA, optical polycarbonate, fluorene polyester, and polyether sulfone, and particularly, a resin having a high melting point and high transparency is preferably used.

In the present embodiment, the minute flat portions 58 and 59 are provided at the bottom of the groove 55 (between the lower end of the vertical surface 53 and the lower end of the inclined surface 54) and at the top of the ridge 56 (between the upper end of the inclined surface 54 and the upper end of the vertical surface 53), respectively, but these minute flat portions may not be provided.

As described above, in the case of the metal layer 26, particularly in order to selectively form the metal layer 26 on the vertical surface 53 of the groove 55 having a triangular cross section with the vertical surface 53 and the inclined surface 54, sputtering, metal deposition, metal particle ejection, ion beam irradiation, or the like is preferably performed in vacuum or at low pressure. At this time, if the minute flat surface portion 58 is formed at the bottom of the groove 55, the metal particles are irradiated onto the vertical surface 53 so as to follow the inclined surface 54 from the top side of the convex line 56 (from the inclined direction), and the adhesion of the metal particles to the inclined surface 54 can be reduced or eliminated. Further, if the inclined surface 54 is not formed in a planar shape, but is formed in a polygonal surface having a polygonal cross section or a concave surface having an arc-shaped cross section which is recessed inward of the convex strip 56, or is formed in an uneven surface having a plurality of minute irregularities (defects) on the surface, adhesion of metal particles can be prevented.

Further, by providing the minute flat portions 59 on the top portions of the ridges 56, the shape of the ridges 56 can be stabilized, and defects and shape defects of the ridges 56 can be prevented, and if the metal layer 26 is formed only on the vertical surfaces 53 of the grooves 55 and irradiation (ejection) of the metal particles is performed from an oblique direction, the metal layer may be formed also on the minute flat portions 59. When a large aerial image forming apparatus is manufactured and used in a state where a metal layer is formed on the minute plane portion 59, both surfaces of the metal layer on the minute plane portion 59 become light reflecting surfaces, and scattering and regular reflection of light occur, so that a stereoscopic image emitting white light is observed. Therefore, it is preferable to perform a process of making the minute flat portion 59 a non-light reflecting surface. For example, as described above, before and after irradiation of the metal particles to form the metal layer 26, black paint (ink) or the like is applied to the micro-planar portions 59, and if a colored film (light-absorbing film) is formed in advance, reflection of light incident from the outside at the micro-planar portions 59 can be prevented. The color of the colored film is not limited to black, and may be any color as long as it can absorb light, and as the ink, it is preferable to use an ink (for example, an ink containing carbon black) such as a pigment having a high hiding degree or a matting having a high light absorbing ability. The thickness of the colored film may be, for example, about several μm to several tens μm, but is 0 μm when the metal layer is impregnated with the coloring material. Instead of forming the colored film, the minute flat portions 59 may be formed as transparent light-transmitting surfaces by removing only metal (unnecessary metal) adhering to the minute flat portions 59 by a peeling process, a polishing process, or a dissolving process after the metal film 26 is formed. In this case, since a part of light contributing to image formation can pass through the minute flat portion 59 without being reflected or absorbed, the three-dimensional image can be prevented from being darkened. In the case where the width of the minute flat portion is extremely small (for example, less than 10 μm), the process of forming the minute flat portion as a non-light-reflecting surface may be omitted.

The large aerial image imaging device 47 is obtained as follows: a configuration in which the plurality of 1 st light control elements 50 are positioned and bonded on the 1 st transparent substrate 13 and a configuration in which the plurality of 2 nd light control elements 51 are positioned and bonded on the 2 nd transparent substrate 19 are prepared, and the 1 st and 2 nd light control units 48 and 49 are integrated by the transparent filling portion 57 while the grooves 55 of the 1 st and 2 nd light control elements 50 and 51 are filled with an uncured (molten) transparent filling material and arranged to face each other to solidify the transparent filling material. The large aerial image forming apparatus 47 has transparent adhesive layers 62 and 63 for bonding between the 1 st light control elements 50 vertically and horizontally adjacent to each other in the 1 st light control unit 48 (i.e., the outer periphery of the 1 st light control element 50) and between the 2 nd light control elements 51 vertically and horizontally adjacent to each other in the 2 nd light control unit 49 (i.e., the outer periphery of the 2 nd light control element 51). The bonding transparent adhesive layer 62 is formed along the strip-shaped light reflection surfaces 11 and 12 of the 1 st and 2 nd light control elements 50 and 51, and the bonding transparent adhesive layer 63 is formed along the end surfaces of the 1 st and 2 nd light control elements 50 and 51 perpendicular to the strip-shaped light reflection surfaces 11 and 12.

In this case, in the 1 st light control unit 48, the plurality of strip-shaped light reflecting surfaces 11 are arranged at equal intervals in the direction perpendicular to the strip-shaped light reflecting surfaces 11, and the strip-shaped light reflecting surfaces 11 adjacent in the longitudinal direction are arranged on the same straight line. Similarly, in the 2 nd light control unit 49, the plurality of strip-shaped light reflection surfaces 12 are arranged at equal intervals in the direction perpendicular to the strip-shaped light reflection surfaces 12, and the strip-shaped light reflection surfaces 12 adjacent in the longitudinal direction are arranged on the same straight line. The strip-shaped light reflection surface 11 of the 1 st light control unit 48 and the strip-shaped light reflection surface 12 of the 2 nd light control unit 49 are perpendicular to each other in a plan view.

In the above configuration, the 1 st and 2 nd transparent substrates 13 and 19, the 1 st and 2 nd transparent adhesive layers 20 and 21, the transparent plate material 52, the transparent filling part 57, and the bonding transparent adhesive layers 62 and 63 preferably have the same or similar refractive index. For example, the refractive index of each of the other members is preferably in the range of 0.8 to 1.2 times (more preferably 0.9 to 1.1 times, and still more preferably 0.95 to 1.15 times) based on the refractive index of the 1 st transparent substrate 13, but the present invention is not limited thereto.

As the transparent filling material for forming the transparent filling portion 57, the same adhesive as used for the 1 st and 2 nd transparent adhesive layers 20 and 21 is preferably used. In this case, by using a transparent synthetic resin having a lower melting point than the transparent resin used as the raw material of the transparent plate material 52, the transparent plate material 52 is not deformed even if the transparent synthetic resin in a molten state is filled, and the shapes of the 1 st and 2 nd light control elements 50 and 51 can be maintained. As the adhesive for forming the transparent adhesive layers 62 and 63 for bonding, the same adhesive as that used for the transparent adhesive layers 23 and 24 for bonding is preferably used, and particularly preferably, the same adhesive is used, but may be formed of different adhesives having similar refractive indices.

The operation of the large aerial image forming apparatus 47 will be described with reference to fig. 6(a) and 6(B), and when light L31 from an object (not shown) enters the 1 st transparent substrate 13 at P31, it is reflected by the P32 of the strip-shaped light reflecting surface 11 formed on the metal layer 26 of the 1 st light control unit 48, enters the 2 nd light control unit 49, is reflected by the P33 of the strip-shaped light reflecting surface 12 formed on the metal layer 26, and then passes through the 2 nd transparent substrate 19 to be emitted from the position of P34 to the aerial image formation.

Here, as shown in fig. 6(a) and 6(B), the light L31 passes through the 1 st transparent adhesive layer 20 at Q31 and passes through the 2 nd transparent adhesive layer 21 at Q32, and as described above, the 1 st and 2 nd transparent substrates 13 and 19, the 1 st and 2 nd transparent adhesive layers 20 and 21, and the transparent plate material 52 have the same or similar refractive index. Furthermore, since the adhesive layers are also thin (for example, about 5 to 20 μm in thickness) and their boundary surfaces are parallel to each other (the thickness is substantially uniform), the influence of refraction is extremely small and phenomena such as total reflection and light splitting do not occur. In addition, the light L31 enters the transparent filling part 57 from the transparent plate material 52 of the 1 st light control part 48 at S31 in fig. 6(a), and enters the transparent plate material 52 of the 2 nd light control part 49 from the transparent filling part 57 at S32 in fig. 6(B), but as described above, the transparent plate materials 52 and the transparent filling part 57 have the same or similar refractive index, and therefore, the influence of refraction is extremely small, and phenomena such as total reflection and light splitting are not caused.

Further, the refraction generated at the positions P31 and P34 is canceled out, and therefore has no influence on the aerial image.

In addition, in FIGS. 6A and 6B, after the light L31 entering from the left side of the metal layer 26 of the 1 st and 2 nd light control parts 48 and 49 passes through the convex strip 56 (a part of the transparent plate material 52), when the reflection is performed at the interface between the vertical surface 53 of the groove 55 and the metal layer 26 (here, the belt-like light reflecting surfaces 11 and 12 on the left side of the metal layer 26), but since the inside of the groove 55 is filled with the transparent filling part 57 having the same or similar refractive index as the transparent plate material 52, therefore, when the light entering direction is reversed right and left (front and back) and light enters from the right side of the metal layer 26 of the 1 st and 2 nd light control units 48 and 49, after passing through the transparent filling part 57, the light is reflected at the interface between the transparent filling part 57 and the metal layer 26 (here, the belt-shaped light reflecting surfaces 11 and 12 on the right side of the metal layer 26), and an aerial image can be formed in the same manner as described above.

Next, a large aerial image forming apparatus 65 according to embodiment 4 of the present invention will be described with reference to fig. 7(a) and 7 (B). Note that the same components as those in embodiments 1 to 3 are denoted by the same reference numerals, and description thereof is omitted

The large aerial image forming apparatus 65 is different from the large aerial image forming apparatus 47 in that the 1 st and 2 nd light control units 48 and 49 are configured by arranging a plurality of the 1 st and 2 nd light control elements 50 and 51 on the lower surface and the upper surface of the intermediate transparent substrate 43, respectively.

In the above configuration, the intermediate transparent substrate 43, the transparent plate material 52, the transparent filling portion 57, and the bonding transparent adhesive layers 62 and 63 have the same or similar refractive index. For example, the refractive index of each of the other members is preferably in the range of 0.8 to 1.2 times (more preferably 0.9 to 1.1 times, and still more preferably 0.95 to 1.15 times) based on the refractive index of the intermediate transparent substrate 43, but the present invention is not limited thereto.

When light L41 from an object, not shown, enters the 1 st light control unit 48 at P41, the light L41 is reflected by the P42 of the strip-shaped light reflection surface 11 formed on the metal layer 26, passes through the intermediate transparent substrate 43, enters the 2 nd light control unit 49, is reflected by the P43 of the strip-shaped light reflection surface 12 formed on the metal layer 26, and is emitted from the position of P44 to the aerial image.

Here, the light L41 enters the transparent filling section 57 from the transparent plate material 52 (convex line 56) of the 1 st light control section 48 at S41 in fig. 7 a, enters the intermediate transparent substrate 43 from the transparent filling section 57 at S42 in fig. 7 a and 7B, enters the transparent filling section 57 from the intermediate transparent substrate 43 at S43 in fig. 7 a and 7B, and enters the transparent plate material 52 (convex line 56) of the 2 nd light control section 49 from the transparent filling section 57 at S44 in fig. 7B.

Further, the refraction generated at the positions P41 and P44 is canceled out, and therefore has no influence on the aerial image.

In addition, in FIGS. 7A and 7B, after the light L41 entering from the left side of the metal layer 26 of the 1 st and 2 nd light control parts 48 and 49 passes through the convex strip 56 (a part of the transparent plate material 52), when the reflection is performed at the interface between the vertical surface 53 of the groove 55 and the metal layer 26 (here, the belt-like light reflecting surfaces 11 and 12 on the left side of the metal layer 26), but since the inside of the groove 55 is filled with the transparent filling part 57 having the same or similar refractive index as the transparent plate material 52, therefore, when the light entering direction is reversed right and left (front and back) and light enters from the right side of the metal layer 26 of the 1 st and 2 nd light control units 48 and 49, after passing through the transparent filling part 57, the light is reflected at the interface between the transparent filling part 57 and the metal layer 26 (here, the belt-shaped light reflecting surfaces 11 and 12 on the right side of the metal layer 26), and an aerial image can be formed in the same manner as described above.

The present invention is not limited to the above embodiments, and may be applied to a case where a large aerial image forming apparatus is configured by combining elements of the large aerial image forming apparatus according to each embodiment.

In the above embodiment, the case where the 1 st and 2 nd light control elements having the strip-shaped light reflection surfaces arranged parallel or perpendicular to the sides of the square in a plan view are arranged in the vertical and horizontal directions and then the unnecessary four corners are cut out has been described, but for example, the four corners of the 1 st and 2 nd light control elements may be cut out in advance and the strip-shaped light reflection surfaces may be arranged in the vertical and horizontal directions in a state where the strip-shaped light reflection surfaces are arranged at an angle of 45 degrees (parallel to the diagonal line) with respect to the sides of the square.

In the above-described embodiment, the method of positioning each of the 1 st and 2 nd light control elements can be appropriately selected, and for example, there is a method of adjusting the position and inclination (angle) of each of the strip-shaped light reflection surfaces by enlarging each of the 1 st and 2 nd light control elements with a camera and observing the enlarged light control element in a plan view. In addition, there are also the following methods: the inclination of each of the 1 st and 2 nd light control elements is adjusted so that the direction of reflected light is aligned (parallel) by irradiating at least 1 strip-shaped light reflection surface of each of the 1 st and 2 nd light control elements with laser light or the like from a specific (constant) direction. In either case, if a positioning mechanism having 6 degrees of freedom (capable of moving in a 3-axis direction perpendicular to each other and rotating about each axis) is used, the 1 st and 2 nd light control elements can be accurately positioned.

When the 1 st and 2 nd optical control elements are bonded to the 1 st and 2 nd transparent substrates or the intermediate transparent substrate, the optical control elements may be sequentially bonded to the 1 st and 2 nd transparent substrates or the intermediate transparent substrate while being positioned in a state where an adhesive is applied to the bonding surface of each of the 1 st and 2 nd optical control elements, or the adhesive may be applied to the bonding surface of each of the 1 st and 2 nd optical control elements or the bonding surface of the 1 st and 2 nd transparent substrates or the intermediate transparent substrate over the entire surface thereof in a state where all of the 1 st and 2 nd optical control elements are positioned and held at predetermined positions, and both may be bonded by pressure bonding. The adhesive for bonding the outer peripheral surfaces of the 1 st and 2 nd light control elements may be applied before the positioning of the 1 st and 2 nd light control elements, or may be injected into the gap by capillary action after the positioning.

Further, a method of making the strip-shaped light reflection surface of the 1 st light control unit and the strip-shaped light reflection surface of the 2 nd light control unit perpendicular to each other in a plan view may be appropriately selected, and for example, the following method is preferable: the inclinations (angles) of the 1 st and 2 nd light control units are adjusted so that light emitted from a predetermined object disposed on the 1 st light control unit side is converged on the 2 nd light control unit side to obtain a clear aerial image.

Claims (14)

1. A large aerial image imaging device, comprising: a 1 st transparent substrate; a 1 st light control unit in which a plurality of 1 st light control elements are arranged in a row on an upper surface of the 1 st transparent substrate, the 1 st light control elements including a plurality of strip-shaped light reflection surfaces arranged in parallel at intervals in an erected state; a 2 nd light control unit in which a plurality of 2 nd light control elements are arranged in a row on an upper surface of the 1 st light control unit, the 2 nd light control elements including a plurality of strip-shaped light reflection surfaces arranged in parallel at intervals in an erected state; and a 2 nd transparent substrate disposed on an upper surface of the 2 nd light control section,

in each of the 1 st light control unit and the 2 nd light control unit, the plurality of strip-shaped light reflection surfaces are arranged at equal intervals in a direction perpendicular to the strip-shaped light reflection surfaces, the strip-shaped light reflection surfaces adjacent in the longitudinal direction are arranged on the same straight line, and the strip-shaped light reflection surface of the 1 st light control unit and the strip-shaped light reflection surface of the 2 nd light control unit are perpendicular to each other in a plan view.

2. Large aerial image imaging device according to claim 1,

the optical module includes a 1 st transparent substrate, a 2 nd light control unit, and a 1 st transparent adhesive layer between the 1 st transparent substrate and the 1 st light control unit, a 2 nd transparent adhesive layer between the 2 nd transparent substrate and the 2 nd light control unit, and an intermediate transparent adhesive layer between the 1 st light control unit and the 2 nd light control unit.

3. Large aerial image imaging device according to claim 1 or 2,

the 1 st light control element and the 2 nd light control element are formed by alternately laminating a transparent block body in a rectangular parallelepiped shape and a metal layer constituting the belt-like light reflection surface.

4. Large aerial image imaging device according to claim 3,

in the 1 st and 2 nd light control units, the transparent block of the 1 st and 2 nd light control elements on one side of the 1 st and 2 nd light control elements adjacent to each other in a direction perpendicular to the strip-shaped light reflection surface is disposed adjacent to the transparent block or the metal layer of the 1 st and 2 nd light control elements on the other side, and a transparent adhesive layer for bonding is provided therebetween.

5. Large aerial image imaging device according to claim 3,

in the 1 st light control unit and the 2 nd light control unit, the metal layer of one of the 1 st light control element and the 2 nd light control element adjacent to each other in a direction perpendicular to the strip-shaped light reflection surface is disposed adjacent to the metal layer of the other of the 1 st light control element and the 2 nd light control element, and a bonding opaque adhesive layer is provided therebetween.

6. Large aerial image imaging device according to claim 1 or 2,

the 1 st light control element and the 2 nd light control element are each provided with a plurality of grooves having a triangular cross section and a vertical surface and an inclined surface, and a plurality of ridges having a triangular cross section and formed between the adjacent grooves, which are arranged in parallel on one surface side of a transparent plate material, the vertical surface of each groove having a metal layer forming the belt-shaped light reflection surface, and the 1 st light control element and the 2 nd light control element each having a transparent filling portion filled with a transparent filling material having a refractive index equal to or similar to the refractive index of each transparent plate material in each groove of the 1 st light control element and the 2 nd light control element.

7. Large aerial image imaging device according to claim 1 or 2,

the 1 st light control element and the 2 nd light control element are formed in a quadrilateral shape having a length of each side of 50 to 200mm in a plan view.

8. A large aerial image imaging device, comprising: an intermediate transparent substrate; a 1 st light control unit in which a plurality of 1 st light control elements are arranged in a row on a lower surface of the intermediate transparent substrate, the 1 st light control elements including a plurality of strip-shaped light reflection surfaces arranged in parallel at intervals in an erected state; and a 2 nd light control unit in which a plurality of 2 nd light control elements are arranged in a row on the upper surface of the intermediate transparent substrate, the 2 nd light control elements including a plurality of strip-shaped light reflecting surfaces arranged in parallel with a gap therebetween in an erected state,

in each of the 1 st light control unit and the 2 nd light control unit, the plurality of strip-shaped light reflection surfaces are arranged at equal intervals in a direction perpendicular to the strip-shaped light reflection surfaces, the strip-shaped light reflection surfaces adjacent in the longitudinal direction are arranged on the same straight line, and the strip-shaped light reflection surface of the 1 st light control unit and the strip-shaped light reflection surface of the 2 nd light control unit are perpendicular to each other in a plan view.

9. Large aerial image imaging device according to claim 8,

a lower surface transparent adhesive layer is provided between the intermediate transparent substrate and the 1 st light control unit, and an upper surface transparent adhesive layer is provided between the intermediate transparent substrate and the 2 nd light control unit.

10. Large aerial image imaging device according to claim 8 or 9,

the 1 st light control element and the 2 nd light control element are formed by alternately laminating a transparent block body in a rectangular parallelepiped shape and a metal layer constituting the belt-like light reflection surface.

11. The large aerial image imaging device of claim 10,

in the 1 st and 2 nd light control units, the transparent block of the 1 st and 2 nd light control elements on one side of the 1 st and 2 nd light control elements adjacent to each other in a direction perpendicular to the strip-shaped light reflection surface is disposed adjacent to the transparent block or the metal layer of the 1 st and 2 nd light control elements on the other side, and a transparent adhesive layer for bonding is provided therebetween.

12. The large aerial image imaging device of claim 10,

in the 1 st light control unit and the 2 nd light control unit, the metal layer of one of the 1 st light control element and the 2 nd light control element adjacent to each other in a direction perpendicular to the strip-shaped light reflection surface is disposed adjacent to the metal layer of the other of the 1 st light control element and the 2 nd light control element, and a bonding opaque adhesive layer is provided therebetween.

13. Large aerial image imaging device according to claim 8 or 9,

the 1 st light control element and the 2 nd light control element are each provided with a plurality of grooves having a triangular cross section and a vertical surface and an inclined surface, and a plurality of ridges having a triangular cross section and formed between the adjacent grooves, which are arranged in parallel on one surface side of a transparent plate material, the vertical surface of each groove having a metal layer forming the belt-shaped light reflection surface, and the 1 st light control element and the 2 nd light control element each having a transparent filling portion filled with a transparent filling material having a refractive index equal to or similar to the refractive index of each transparent plate material in each groove of the 1 st light control element and the 2 nd light control element.

14. Large aerial image imaging device according to claim 8 or 9,

the 1 st light control element and the 2 nd light control element are formed in a quadrilateral shape having a length of each side of 50 to 200mm in a plan view.

Images